Try to lay off of products that have SLS (Sodium Laurel Sulfate) and Alcohol because those will dry you out.

Massage the scalp with your fingertips in a circular motion and that will stimulate blood flow to the scalp. You aren't going to see results over night but over time your gaps will fill in, your locks will lock up naturally and your tight dreads will probably loosen up a little bit more becoming thicker looking.